package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper  userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional(rollbackFor = Exception.class)
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、购物车为空） 获取地址
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //购物车信息通过用户id 获取
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        //购物车不能为空
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据 对比dto数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);

        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        //可以用uuid
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());
        //向订单表插入1条数据  返回主键
        orderMapper.insert(order);

        //订单明细数据  详情1 sop - order
        List<OrderDetail> orderDetailList = new ArrayList<>();

        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //高端 写法 stream 生产线

        //向明细表插入n条数据 、、批量插入
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据 全部清除
        shoppingCartMapper.clean(shoppingCart);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
        return orderSubmitVO;
    }

    @Override
    public PageResult history(OrdersPageQueryDTO ordersPageQueryDTO) {
        // 设置分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        // 获得用户id
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        //获取状态 来分页
        ordersPageQueryDTO.setStatus(ordersPageQueryDTO.getStatus());
        // 分页条件查询
        Page<Orders> page = orderMapper.historyPage(ordersPageQueryDTO);
        //创建集合装 页面的多条数据 ，装的是返回给前端的数据
        List<OrderVO> list = new ArrayList();
        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                // 订单id
                Long orderId = orders.getId();
                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.selectOrder(orderId);
                //创建订单前端数据 将订单数据复制给订单前端数据
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                //订单明细
                orderVO.setOrderDetailList(orderDetails);
                //一个一个加进去
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }
    @Override
    public OrderVO selectOrder(Long id) {
        //根据id查询订单
        Orders orders= orderMapper.select(id);
        //根据订单id查询
        List<OrderDetail> orderDetailList =  orderDetailMapper.selectOrder(orders.getId());
        //将详情封装         //获得订单详情前端数据
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);

        orderVO.setOrderDetailList(orderDetailList);
        return orderVO ;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {

        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        return vo;
    }
    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        // 根据订单号查询当前用户的订单？
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);
        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void putOrder(Long id) {
        //根据id查询 订单
        Orders ordersDb = orderMapper.select(id);

        //获取订单对象
        Orders orders = new Orders();
        orders.setId(ordersDb.getId());
        // 修改订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    //再来一单
    @Override
    public void zai(Long id) {
        //点击再来 数据回到购物车
        //获取购物车对象添加

        //获取当前用户
        Long currentId = BaseContext.getCurrentId();
        //创建购物车
        ArrayList<ShoppingCart> shoppingCarts = new ArrayList<>();
        //获取订单详情 获取订单商品重新添加上购物车
        List<OrderDetail> orderDetailList = orderDetailMapper.selectOrder(id);
        for (OrderDetail orderDetail : orderDetailList) {

            ShoppingCart cart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail,cart);

            cart.setUserId(currentId);

            cart.setCreateTime(LocalDateTime.now());

            shoppingCarts.add(cart);

        }
        shoppingCartMapper.insertCart(shoppingCarts);
    }
}
